Preferred stock converted to common stock.

No definition available.

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- Definition

Stock redeemed shares.

+ References

No definition available.

+ Details

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- Definition

Stock repurchased during period shares related to withholding taxes of cancellation of restricted stock.

+ References

No definition available.

+ Details

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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- Definition

Date the preferred stock has been redeemed, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

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-Publisher FASB

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-Topic 505

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (a)

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- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

+ Details

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

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-Section 50

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-Publisher FASB

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-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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-Publisher FASB

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-Paragraph 3

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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-Name Accounting Standards Codification

-Topic 210

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-Paragraph 1

-Subparagraph (SX 210.5-02.29-30)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.

+ References

No definition available.

+ Details

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

+ Details

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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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- Details

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Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Aug. 09, 2013
Class Of Stock [Line Items]
Preferred stock redemption date	Aug. 09, 2013
Preferred stock dividend rate		5.50%
Preferred stock outstanding		0us-gaap_PreferredStockSharesOutstanding	61,735us-gaap_PreferredStockSharesOutstanding
Number of Preferred shares converted		60,900
Number of common shares issued upon conversion of preferred stock		139,029
Preferred shares redeemed		835scl_StockRedeemedShares
Aggregate redemption price		$ 25.26354
Treasury stock, shares	3,384,443us-gaap_TreasuryStockShares	3,231,289us-gaap_TreasuryStockShares
Treasury stock distributed under deferred compensation plan	3,658
Stock purchased to settle employees statutory withholding taxes relates to performance stock awards and deferred compensation distribution	2,179
Open Market Repurchases [Member]
Class Of Stock [Line Items]
Shares purchased during period	154,633
Price per share [Member]
Class Of Stock [Line Items]
Aggregate redemption price		$ 25.00
Accrued and Unpaid Dividends [Member]
Class Of Stock [Line Items]
Aggregate redemption price		$ 0.26354